Quite arbitrarily. But in the northern hemisphere, the shadow of a sundial will traverse clockwise. And this is probably the origin of the term and the common usage. [My speculation.]
True magnetic bearing is the angle measured clockwise from true north to a destination point. It takes into account the magnetic declination, which is the difference between true north and magnetic north at a specific location. This type of bearing is important for accurate navigation using a magnetic compass.
Magnetic declination, or the angle between magnetic north and true north, is typically most pronounced in areas near the magnetic poles. This includes regions like northern Canada and parts of northern Russia, where the magnetic field lines are more vertical and can lead to significant variations in declination. Additionally, areas around the equator may also experience notable declination changes due to the complex interactions of the Earth's magnetic field.
magnetic variation
The magnetic declination of Livermore, California is approximately 14 degrees east. This means that the compass needle will point 14 degrees to the east of true north.
As of October 2023, the magnetic declination for Cincinnati, Ohio, is approximately 6 degrees west. This means that magnetic north is about 6 degrees west of true north in that area. However, magnetic declination can change over time due to shifts in the Earth's magnetic field, so it's advisable to check for the most current information before navigation.
It is measured exactly the same in the Southern hemisphere (no difference between the two hemispheres). It is the difference between magnetic north and true north and it varies all over the globe. Magnetic declination (also called magnetic variation) is positive when magnetic north is east of true north (clockwise) and it is negative when magnetic north is west of true north (anti-clockwise).
I am not affected by magnetic declination as I am an artificial intelligence and do not have physical properties that interact with magnetic fields. Magnetic declination primarily impacts compasses and navigation systems that rely on magnetic north for direction.
To calculate the magnetic bearing, you would subtract the declination from the true bearing if the declination is east, or add the declination if the declination is west. In this case, since the declination is 8 degrees east, you would subtract the declination from the true bearing of 180 degrees. Magnetic bearing = True bearing - Declination Magnetic bearing = 180 degrees - 8 degrees Magnetic bearing = 172 degrees
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Assuming the subject is magnetic declination the difference between the north pole and the true north pole this difference, is the magnetic declination, there is not information on what purpose it serves.
True magnetic bearing is the angle measured clockwise from true north to a destination point. It takes into account the magnetic declination, which is the difference between true north and magnetic north at a specific location. This type of bearing is important for accurate navigation using a magnetic compass.
The magnetic declination is greatest in the northern part of North America, particularly in areas close to the magnetic North Pole. This includes regions of northern Canada and Alaska, where the declination can exceed 20 degrees. As one moves southward, the declination generally decreases.
There is a general geographical difference, called magnetic declination. In addition, there may be differences that arise locally, as a result of nearby objects that attract a magnet, which is called magnetic deviation. Related links are given below.
Magnetic Declination
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Magnetic declination, or the angle between magnetic north and true north, is typically most pronounced in areas near the magnetic poles. This includes regions like northern Canada and parts of northern Russia, where the magnetic field lines are more vertical and can lead to significant variations in declination. Additionally, areas around the equator may also experience notable declination changes due to the complex interactions of the Earth's magnetic field.
The magnetic declination in Jasper, Alberta, Canada is approximately 18 degrees east. This means that magnetic north is 18 degrees east of true north in this location.